Re: spam blocking engine

["David S." <davids_(_at_)_idiom_(_dot_)_com>]

> > Getting a good list of open relays is hard.  The last time I looked
> > (which was, admittedly, a while ago) I did not find very good
> > correspondence between the sites from which I saw spam being
> > originated, and which sites were blocked in several popular lists.
> 
> relays.visi.com was good, but it's been shut down.
> 

Somebody at the San Diego Supercomputing Center publishes a survey 
survey and comparison of publicly-accessible DNS blacklists of spam 
sources:

	http://www.sdsc.edu/~jeff/spam/Blacklists%5FCompared.html

David S.